rocksdb

fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph

Peter Dillinger a8a422e962 Add manifest fix-up utility for file temperatures (#9683 ) Summary: The goal of this change is to allow changes to the "current" (in FileSystem) file temperatures to feed back into DB metadata, so that they can inform decisions and stats reporting. In part because of modular code factoring, it doesn't seem easy to do this automagically, where opening an SST file and observing current Temperature different from expected would trigger a change in metadata and DB manifest write (essentially giving the deep read path access to the write path). It is also difficult to do this while the DB is open because of the limitations of LogAndApply. This change allows updating file temperature metadata on a closed DB using an experimental utility function UpdateManifestForFilesState() or `ldb update_manifest --update_temperatures`. This should suffice for "migration" scenarios where outside tooling has placed or re-arranged DB files into a (different) tiered configuration without going through RocksDB itself (currently, only compaction can change temperature metadata). Some details: * Refactored and added unit test for `ldb unsafe_remove_sst_file` because of shared functionality * Pulled in autovector.h changes from https://github.com/facebook/rocksdb/issues/9546 to fix SuperVersionContext move constructor (related to an older draft of this change) Possible follow-up work: * Support updating manifest with file checksums, such as when a new checksum function is used and want existing DB metadata updated for it. * It's possible that for some repair scenarios, lighter weight than full repair, we might want to support UpdateManifestForFilesState() to modify critical file details like size or checksum using same algorithm. But let's make sure these are differentiated from modifying file details in ways that don't suspect corruption (or require extreme trust). Pull Request resolved: https://github.com/facebook/rocksdb/pull/9683 Test Plan: unit tests added Reviewed By: jay-zhuang Differential Revision: D34798828 Pulled By: pdillinger fbshipit-source-id: cfd83e8fb10761d8c9e7f9c020d68c9106a95554		3 years ago
.circleci	crash_test Makefile refactoring, add to CircleCI (#9702 )	3 years ago
.github/workflows	Use released clang-format instead of the one from dev branch (#9646 )	3 years ago
buckifier	regenerate config jsons, reduce noise (#9644 )	3 years ago
build_tools	Reenable s390x platform_dependent travis job (#9631 )	3 years ago
cache	typo(clock_cache) fix incomplete message typo (#9638 )	3 years ago
cmake	gcc-11 and cmake related cleanup (#9286 )	3 years ago
coverage	Remove asan_symbolize.py for internal asan build (#8737 )	3 years ago
db	Add manifest fix-up utility for file temperatures (#9683 )	3 years ago
db_stress_tool	New backup meta schema, with file temperatures (#9660 )	3 years ago
docs	Update Githubpages version (#9670 )	3 years ago
env	Fix race condition caused by concurrent accesses to forceMmapOff_ when opening Posix WritableFile (#9685 )	3 years ago
examples	Remove BlockBasedTableOptions.hash_index_allow_collision (#9454 )	3 years ago
file	Deflake DeleteSchedulerTest.StartBGEmptyTrashMultipleTimes (#9706 )	3 years ago
fuzz	Fix compilation errors and add fuzzers to CircleCI (#9420 )	3 years ago
include/rocksdb	Add manifest fix-up utility for file temperatures (#9683 )	3 years ago
java	NPE in Java_org_rocksdb_ColumnFamilyOptions_setSstPartitionerFactory (#9622 )	3 years ago
logging	Use system-wide thread ID in info log lines (#9164 )	3 years ago
memory	Return different Status based on ObjectRegistry::NewObject calls (#9333 )	3 years ago
memtable	Remove using namespace (#9369 )	3 years ago
microbench	regenerate config jsons, reduce noise (#9644 )	3 years ago
monitoring	Dedicate cacheline for DB mutex (#9637 )	3 years ago
options	New backup meta schema, with file temperatures (#9660 )	3 years ago
plugin	Add initial CMake support to plugin (#9214 )	3 years ago
port	#include <winioctl.h> as MSDN prescribes (#9612 )	3 years ago
table	New backup meta schema, with file temperatures (#9660 )	3 years ago
test_util	Remove BlockBasedTableOptions.hash_index_allow_collision (#9454 )	3 years ago
third-party	Work around some new clang-analyze failures (#9515 )	3 years ago
tools	Add manifest fix-up utility for file temperatures (#9683 )	3 years ago
trace_replay	Added `TraceOptions::preserve_write_order` (#9334 )	3 years ago
util	Add manifest fix-up utility for file temperatures (#9683 )	3 years ago
utilities	New backup meta schema, with file temperatures (#9660 )	3 years ago
.clang-format	A script that automatically reformat affected lines	11 years ago
.gitignore	gitignore cmake-build-* for CLion integration (#7933 )	4 years ago
.lgtm.yml	Create lgtm.yml for LGTM.com C/C++ analysis (#4058 )	7 years ago
.travis.yml	Reenable s390x platform_dependent travis job (#9631 )	3 years ago
.watchmanconfig	Added .watchmanconfig file to rocksdb repo (#5593 )	6 years ago
AUTHORS	Update RocksDB Authors File	7 years ago
CMakeLists.txt	Avoid popcnt on Windows when unavailable and in portable builds (#9680 )	3 years ago
CODE_OF_CONDUCT.md	Adopt Contributor Covenant	5 years ago
CONTRIBUTING.md	Add Code of Conduct	7 years ago
COPYING	Add GPLv2 as an alternative license.	8 years ago
DEFAULT_OPTIONS_HISTORY.md	Add Options::DisableExtraChecks, clarify force_consistency_checks (#9363 )	3 years ago
DUMP_FORMAT.md	First version of rocksdb_dump and rocksdb_undump.	10 years ago
HISTORY.md	Add manifest fix-up utility for file temperatures (#9683 )	3 years ago
INSTALL.md	Clarify Google benchmark < 1.6.0 in INSTALL.md (#9505 )	3 years ago
LANGUAGE-BINDINGS.md	Update branch name to "main" in README/LANGUAGE_BINDINGS (#8727 )	3 years ago
LICENSE.Apache	Change RocksDB License	8 years ago
LICENSE.leveldb	Add back the LevelDB license file	8 years ago
Makefile	Add manifest fix-up utility for file temperatures (#9683 )	3 years ago
PLUGINS.md	Move RADOS support to separate repo (#9206 )	3 years ago
README.md	README: De-list slack channel, list Google group (#9387 )	3 years ago
ROCKSDB_LITE.md	Fix some typos in comments and docs.	7 years ago
TARGETS	Support user-defined timestamps in write-committed txns (#9629 )	3 years ago
USERS.md	Add Solana's RocksDB use case in USERS.md (#9558 )	3 years ago
Vagrantfile	Adding CentOS 7 Vagrantfile & build script	7 years ago
WINDOWS_PORT.md	Update branch name in WINDOWS_PORT.md (#8745 )	3 years ago
crash_test.mk	Improve stress test for transactions (#9568 )	3 years ago
issue_template.md	Add Google Group to Issue Template	5 years ago
python.mk	crash_test Makefile refactoring, add to CircleCI (#9702 )	3 years ago
src.mk	Support user-defined timestamps in write-committed txns (#9629 )	3 years ago
thirdparty.inc	Fix build jemalloc api (#5470 )	6 years ago

README.md

RocksDB: A Persistent Key-Value Store for Flash and RAM Storage

RocksDB is developed and maintained by Facebook Database Engineering Team. It is built on earlier work on LevelDB by Sanjay Ghemawat (sanjay@google.com) and Jeff Dean (jeff@google.com)

This code is a library that forms the core building block for a fast key-value server, especially suited for storing data on flash drives. It has a Log-Structured-Merge-Database (LSM) design with flexible tradeoffs between Write-Amplification-Factor (WAF), Read-Amplification-Factor (RAF) and Space-Amplification-Factor (SAF). It has multi-threaded compactions, making it especially suitable for storing multiple terabytes of data in a single database.

Start with example usage here: https://github.com/facebook/rocksdb/tree/main/examples

See the github wiki for more explanation.

The public interface is in include/. Callers should not include or rely on the details of any other header files in this package. Those internal APIs may be changed without warning.

Questions and discussions are welcome on the RocksDB Developers Public Facebook group and email list on Google Groups.

License

RocksDB is dual-licensed under both the GPLv2 (found in the COPYING file in the root directory) and Apache 2.0 License (found in the LICENSE.Apache file in the root directory). You may select, at your option, one of the above-listed licenses.